A kind of anti-fall device of guide rail lifting platform

Abstract

The present invention discloses a guide rail type lifting platform anti-falling device, which relates to the technical field of lifting equipment anti-falling. It comprises a fixed plate, a rotating connecting plate, and a support rod. The fixed plate is connected to the guide rail of the guide rail type lifting platform, one end of the rotating connecting plate is hinged to the fixed plate, and one end of the rotating connecting plate away from the fixed plate is hinged to the support rod. The present invention can allow the lifting platform to be supported by the support rod to prevent the lifting platform from falling even if there is a danger of the lifting platform suddenly falling when the operating personnel go to the bottom of the lifting platform to perform operations, thereby ensuring the personal safety of the operating personnel located under the lifting platform, avoiding safety accidents, and improving operation safety.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-falling of lifting equipment, and in particular to an anti-falling device for a guide rail type lifting platform. Background Art

[0002] The guide rail type lifting platform comprises a lifting platform, a guide rail and an oil cylinder. The upper end of the piston rod of the oil cylinder is connected to the lifting platform, and the lifting platform is lifted and lowered along the guide rail.

[0003] When it is necessary to perform inspection and maintenance on the rail-type lifting platform, it is necessary to shut down the oil pump used to transfer hydraulic oil to the oil cylinder through the oil pipe. After the oil pump is shut down, the hydraulic oil in the cylinder no longer changes, so that the position of the piston rod in the cylinder no longer changes, thereby stopping the lifting platform from lifting. At this time, the operator goes to the bottom of the lifting platform to perform the operation.

[0004] However, as the oil pipe is used for a longer time or the oil pipe is of low quality, once the oil pipe is broken, the hydraulic oil in the oil cylinder will be lost, causing the piston rod in the oil cylinder to drop, which will cause the lifting platform to lose the support of the piston rod and fall; or the connection between the piston rod of the oil cylinder and the lifting platform will become loose or broken due to fatigue, causing the lifting platform to fall suddenly. All of these will endanger the personal safety of the operators under the lifting platform and cause safety accidents.

[0005] Therefore, how to prevent the lifting platform from falling suddenly and improve operation safety is a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a guide rail type lifting platform anti-falling device, which can prevent the lifting platform from falling suddenly and improve operation safety.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A fall prevention device for a rail-type lifting platform comprises a fixed plate, a rotating connecting plate and a support rod. The fixed plate is connected to the rail of the rail-type lifting platform, one end of the rotating connecting plate is hinged to the fixed plate, and the end of the rotating connecting plate away from the fixed plate is hinged to the support rod.

[0009] Furthermore, a guide rod is provided on one side of the fixed plate close to the rotating connecting plate, and the rotating connecting plate is provided with an arc-shaped guide sliding hole for cooperating with the guide rod.

[0010] Furthermore, the fixing plate is provided with a first positioning hole, and the rotating connecting plate is provided with a second positioning hole for communicating with the first positioning hole, and both the first positioning hole and the second positioning hole cooperate with the positioning rod.

[0011] Furthermore, it also includes a stop switch arranged below the fixed plate, the stop switch is connected to the guide rail, the stop switch cooperates with the rotating connecting plate, and the stop switch is electrically connected to the oil pump.

[0012] Furthermore, the guide rail type lifting platform includes two rows of guide rails, a lifting platform arranged between the two rows of guide rails, and a cylinder installed on a cylinder bracket. The guide rails and the cylinder bracket are both arranged on a base. A lifting seat is provided at the upper end of the piston rod of the cylinder. First roller seats are provided at both ends of the lifting seat. The first roller seat is provided with rollers for rolling along the guide rails. The first lifting seat is connected to the lifting platform by a chain.

[0013] Furthermore, a guardrail is provided on the lifting platform.

[0014] Furthermore, a second roller seat is provided on one side of the lifting platform close to the guide rail, and the second roller seat is provided with a second roller for rolling along the guide rail.

[0015] The present invention has the beneficial effects:

[0016] 1. The present invention can ensure that when the operators are working under the lifting platform, even if the lifting platform suddenly falls, the lifting platform can still be supported by the support rods to prevent the lifting platform from falling, thereby ensuring the personal safety of the operators under the lifting platform, avoiding safety accidents and improving operation safety.

[0017] 2. By providing a guide rod and a guide slide hole, when the rotating connecting plate rotates with the hinge between the rotating connecting plate and the fixed plate as the rotation center, the guide rod can slide along the guide slide hole, thereby limiting the rotation trajectory of the rotating connecting plate and improving the accuracy and reliability of the rotation of the rotating connecting plate.

[0018] 3. By setting the positioning rod, the first positioning hole and the second positioning hole, when the support rod is in the extended state, the rotating connecting plate can be prevented from continuing to rotate with the hinge between the rotating connecting plate and the fixed plate as the rotation center, thereby improving the stability of the lifting platform supported by the support rod.

[0019] 4. By setting the stop switch, the lifting platform can be supported by the support rod to prevent the sudden fall of the lifting platform. At the same time, the oil pump can be shut down when the support rod is opened to prevent the lifting platform from moving. The operation is simple and quick.

[0020] 5. By setting up guardrails, the safety of people and objects on the lifting platform can be improved.

[0021] 6. By setting the second roller seat and the second roller, the lifting platform can only move along the vertical direction of the guide rail without shaking when the lifting platform is lifted and lowered with the chain, thereby achieving the guiding effect on the lifting platform and improving the stability of the lifting platform when the lifting platform is lifted and lowered with the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a guide rail type lifting platform anti-falling device of Example 1;

[0023] Figure 2 This is a schematic diagram of the use status of a guide rail type lifting platform anti-falling device in Example 1 Figure 1 ;

[0024] Figure 3 yes Figure 2 A partial enlarged view of point A;

[0025] Figure 4 yes Figure 2 A partial enlarged view of point B;

[0026] Figure 5 yes Figure 2 A partial enlarged view of point C;

[0027] Figure 6 This is a schematic diagram of the use status of a guide rail type lifting platform anti-falling device in Example 1 Figure 2 ;

[0028] Figure 7 This is a schematic diagram of the use status of a guide rail type lifting platform anti-falling device in Example 2 Figure 1 ;

[0029] Figure 8 yes Figure 7 A local enlarged view of point D;

[0030] Fig. 9 This is a schematic diagram of the use status of a guide rail type lifting platform anti-falling device in Example 2 Figure 2 ;

[0031] Fig.10 This is a circuit diagram of Example 2.

[0032] Description of reference numerals:

[0033] 1-fixed plate, 1-1-first hinge hole, 1-2-guide column, 1-3-first positioning hole,

[0034] 2-rotating connecting plate, 2-1-second hinge hole, 2-2-guide sliding hole, 2-2-1-upper end of the guide sliding hole, 2-2-2-lower end of the guide sliding hole, 2-3-third hinge hole, 2-4-second positioning hole,

[0035] 3-Support rod, 3-1-Fourth hinge hole,

[0036] 4- First fastener,

[0037] 5- Second fastener,

[0038] 6- Positioning rod,

[0039] 7-guide rail, 7-1-first connecting rod, 7-2-second connecting rod,

[0040] 8-lifting platform, 8-1-guardrail, 8-2-second roller seat, 8-3-second roller,

[0041] 9-Cylinder, 9-1-Cylinder bracket, 9-2-Lifting seat, 9-3-First roller seat, 9-4-First roller, 9-5-Chain wheel,

[0042] 10-stop switch, 10-1-mounting plate. DETAILED DESCRIPTION

[0043] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings. It is worth noting that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0044] Embodiment 1:

[0045] A guide rail lifting platform anti-fall device, such as Figure 1 As shown, it includes a fixed plate 1, a rotating connecting plate 2, and a support rod 3.

[0046] like Figure 1 As shown, the fixing plate 1 is provided with a first hinge hole 1 - 1 and a first positioning hole 1 - 3 , and a guide column 1 - 2 is welded and fixed to one side of the fixing plate 1 close to the rotating connecting plate 2 .

[0047] like Figure 1As shown, one end of the rotating connecting plate 2 is provided with a second hinge hole 2-1 and a guide sliding hole 2-2. The guide sliding hole 2-2 is an arc hole with the axis of the second hinge hole 2-1 as the center of the circle. The axis of the second hinge hole 2-1 refers to the positive projection of the axis of the second hinge hole 2-1 on the radial section of the second hinge hole 2-1. The radial section of the second hinge hole 2-1 is circular, and the positive projection of the axis of the second hinge hole 2-1 on its radial section is the center of the circle. The end of the rotating connecting plate 2 away from the second hinge hole 2-1 is provided with a third hinge hole 2-3, and the rotating connecting plate 2 is provided with a second positioning hole 2-4.

[0048] like Figure 1 As shown, the upper end of the support rod 3 is provided with a fourth hinge hole 3-1.

[0049] When assembling:

[0050] (1) Install the fixed plate 1 and the rotating connecting plate 2 together: Figure 1 As shown, the guide column 1-2 on the fixed plate 1 is inserted into the guide sliding hole 2-2 on the rotating connecting plate 2, and the first fastener 4 is used to be clearance-matched with the second hinge hole 2-1 and the first hinge hole 1-1 in sequence. A first limiting nut for threading with the first fastener 4 is provided on the side of the fixed plate 1 away from the rotating connecting plate 2. The outer diameter of the first limiting nut is larger than the aperture of the first hinge hole 1-1, so that the rotating connecting plate 2 can rotate with the first fastener 4 as the rotation center, thereby realizing the hinge connection between the fixed plate 1 and the rotating connecting plate 2. Specifically, the first fastener 4 is a bolt or a screw. In this embodiment 1, the first fastener 4 is a hexagonal bolt.

[0051] (2) Install the rotating connecting plate 2 and the supporting rod 3 together: Figure 1 As shown, the second fastener 5 is used to be clearance-matched with the fourth hinge hole 3-1 and the third hinge hole 2-3 in sequence, and a second limiting nut for threading with the second fastener 5 is provided on the side of the rotating connecting plate 2 away from the support rod 3. The outer diameter of the second limiting nut is larger than the aperture of the third hinge hole 2-3, so that the support rod 3 and the rotating connecting plate 2 can rotate relative to each other with the second fastener 5 as the rotation center, thereby realizing the hinge connection between the rotating connecting plate 2 and the support rod 3. Specifically, the second fastener 5 is a screw or a bolt. In this embodiment 1, the second fastener 5 is a hexagonal bolt.

[0052] like Figure 2 As shown, the guide rail type lifting platform includes a guide rail 7, a lifting platform 8, and a cylinder 9.

[0053] like Figure 2As shown, the guide rails 7 are provided in two rows, each row is provided with two groups, each group includes two vertically arranged guide rails 7, and the guide rails 7 are fixedly installed on the base. A horizontally arranged first connecting rod 7-1 is welded and fixed between the two guide rails 7 of each group. By setting the first connecting rod 7-1, the stability of the two guide rails 7 of each group can be improved. A horizontally arranged second connecting rod 7-2 is welded and fixed between the four guide rails 7 of each row. By setting the second connecting rod 7-2, the stability of the guide rails 7 of each row can be improved. The guide rails 7 are made of I-shaped steel.

[0054] like Figure 2 As shown, the lifting platform 8 is arranged between two rows of guide rails 7. In order to improve the safety of personnel and articles on the lifting platform 8, a guardrail 8-1 is welded and fixed to the upper end of the lifting platform 8 on one side close to the guide rail 7.

[0055] like Figure 2 As shown, the oil cylinder bracket 9-1 is arranged between the two guide rails 7 of each group, the oil cylinder bracket 9-1 is fixedly installed on the base, and the oil cylinder 9 is installed on the upper end of the oil cylinder bracket 9-1, as shown in FIG. Figure 3 As shown, a lifting seat 9-2 is fixedly mounted on the upper end of the piston rod of the oil cylinder 9, and first roller seats 9-3 are welded and fixed to the left and right ends of the lifting seat 9-2. A first roller 9-4 that rolls up and down along the guide rail 7 is mounted on the first roller seat 9-3, and a chain wheel 9-5 is mounted on the lifting seat 9-2, and the chain wheel 9-5 is connected to the edge of the lifting platform 8 through a chain.

[0056] like Figure 2 As shown, when the piston rod of the oil cylinder 9 rises, the upper end of the piston rod of the oil cylinder 9 pushes against the lifting seat 9-2 to make the lifting seat 9-2 move up, and the lifting seat 9-2 moves up along the guide rail 7 with the first roller seat 9-3. Since the lifting seat 9-2 is connected to the lifting platform 8 through a chain, the lifting platform 8 also moves up with the lifting seat 9-2. When the piston rod of the oil cylinder 9 descends, the lifting seat 9-2 moves down with the piston rod of the oil cylinder 9, and the lifting seat 9-2 moves down along the guide rail 7 with the first roller seat 9-3, and the lifting platform 8 also moves down with the lifting seat 9-2.

[0057] like Figure 4 As shown, in order to improve the stability of the lifting platform 8 as it rises and falls with the chain and reduce the shaking of the lifting platform 8, a second roller seat 8-2 is welded and fixed on the side of the lifting platform 8 close to the guide rail 7, and a second roller 8-3 that rolls up and down along the guide rail 7 is installed on the second roller seat 8-2. By providing the second roller seat 8-2 and the second roller 8-3, the lifting platform 8 can only move up and down along the vertical direction where the guide rail 7 is located, and cannot shake, during the process of the lifting platform 8 rising and falling with the chain, thereby achieving the guiding effect on the lifting platform 8 and improving the stability of the lifting platform 8 as it rises and falls with the chain.

[0058] When installing:

[0059] like Figure 2 and Figure 5 As shown, the side of the fixed plate 1 away from the rotating connecting plate 2 is welded and fixed to the lower part of the guide rail 7 of the guide rail type lifting platform.

[0060] When using:

[0061] Before the operator goes to the bottom of the lifting platform 8 to perform the operation, Figure 2 and Figure 5 As shown, first, the operator needs to hold the support rod 3 and let the rotating connecting plate 2 rotate clockwise with the first fastener 4 as the rotation center until the rotating connecting plate 2 turns to the horizontal, so that the lower end of the support rod 3 falls on the ground, and the support rod 3 is in an open state. During the clockwise rotation of the rotating connecting plate 2 with the first fastener 4 as the rotation center, the guide rod 1-2 also slides in the guide slide hole 2-2. Specifically, the guide rod 1-2 slides from the upper end 2-2-1 of the guide slide hole to the lower end 2-2-2 of the guide slide hole. Therefore, by setting the guide rod 1-2 and the guide slide hole 2-2, the rotation angle of the rotating connecting plate 2 can be limited, the rotating connecting plate 2 is prevented from excessive rotation, and the accuracy and stability of the rotation of the rotating connecting plate 2 are improved.

[0062] Next, the lifting platform 8 is lowered to allow the lifting platform 8 to land on the upper end of the support rod 3 .

[0063] Then, the operator turns off the oil pump used to transmit the hydraulic oil to the oil cylinder 9 through the oil pipe, so that the lifting platform 8 stops lifting. At this time, the operator goes to the bottom of the lifting platform 8 to perform operations.

[0064] When the operators are working under the lifting platform 8, if the oil pipe ruptures, the piston rod in the oil cylinder 9 cannot continue to support the lifting platform 8, causing the lifting platform 8 to fall suddenly; or the chain breaks, causing the lifting platform 8 to fall suddenly. Since the support rod 3 of this embodiment can still support the lifting platform 8, the lifting platform 8 is prevented from falling, thereby ensuring the personal safety of the operators under the lifting platform 8, avoiding safety accidents, and improving operation safety.

[0065] In order to further improve the stability of the support rod 3 supporting the lifting platform 8, as Figure 1 and Figure 5 As shown, the positioning rod 6 is matched with the second positioning hole 2-4 and the first positioning hole 1-3 in sequence, thereby preventing the rotating connecting plate 2 from rotating with the first fastener 4 as the rotation center, thereby improving the stability of the support rod 3 supporting the lifting platform 8.

[0066] When the operation is finished, the operator comes out from the bottom of the lifting platform 8, and after the operator repairs the fault, Figure 5 and Figure 6 As shown, first remove the positioning rod 6 from the first positioning hole 1-3 and the second positioning hole 1-4 in sequence, and then retract the support rod 3. During the process of retracting the support rod 3, the rotating connecting plate 2 rotates counterclockwise with the first fastener 4 as the rotation center. At this time, the guide rod 1-2 also slides from the lower end 2-2-2 of the guide sliding hole to the upper end 2-2-1 of the guide sliding hole. After the support rod 3 is retracted, the support rod 3 no longer supports the lifting platform 8. Thereafter, the lifting platform 8 can continue to be used.

[0067] Embodiment 2:

[0068] This embodiment 2 is the same as embodiment 1, except that Figure 7 and Figure 8 As shown, the anti-fall device of a guide rail type lifting platform of this embodiment 2 also includes a stop switch 10, which is arranged below the fixed plate 1. The stop switch 10 is fixed to the guide rail 7 through the mounting plate 10-1, and the stop switch 10 cooperates with the lower end of the rotating connecting plate 1. Fig.10 As shown, the stop switch 10 is electrically connected to the oil pump, and specifically, the stop switch 10 is electrically connected to the hydraulic motor for driving the oil pump. In this embodiment, four stop switches 10 are provided, and the stop switches 10 are TR236 type automatic switches.

[0069] When using:

[0070] Before the operator goes to the bottom of the lifting platform 8 to perform the operation, first, the lifting platform 8 is lowered so that the lifting platform 8 falls on the top of the support rod 3 .

[0071] Then, if Figure 8 As shown, the operator holds the support rod 3 to keep the support rod 3 vertical, and rotates the rotating connecting plate 2 clockwise with the first fastener 4 as the rotation center until the rotating connecting plate 2 turns to the horizontal, so that the lower end of the support rod 3 falls on the ground, and the support rod 3 is in the open state. During the clockwise rotation of the rotating connecting plate 2 with the first fastener 4 as the rotation center, the lower end of the rotating connecting plate 2 also changes from the state of pressing the button of the stop switch 10 to the state of leaving the button of the stop switch 10, that is, the stop switch 10 changes from the state of pressing the button of the stop switch 10 to the state of leaving the button of the stop switch 10. Fig. 9 The status shown changes to Figure 7 In the state shown, the circuit controlled by the stop switch 10 is changed from a closed state to an open state, so that the oil pump cannot continue to work.

[0072] Then, the operator goes to the lower part of the lifting platform 8 to perform the operation.

[0073] When the operators are working under the lifting platform 8, once the oil pipe ruptures, the piston rod in the oil cylinder 9 cannot continue to support the lifting platform 8, causing the lifting platform 8 to fall suddenly; or the chain breaks, causing the lifting platform 8 to fall suddenly. Since the support rod 8 of this embodiment can still support the lifting platform 8, the lifting platform 8 is prevented from falling, thereby ensuring the personal safety of the operators under the lifting platform 8, avoiding safety accidents and improving operation safety.

[0074] When the operation is finished, the operator comes out from under the lifting platform 8, and after the operator has repaired the fault, the support rod 3 is retracted. During the process of retracting the support rod 3, the rotating connecting plate 2 rotates counterclockwise with the first fastener 4 as the rotation center. At this time, the lower end of the rotating connecting plate 2 also changes from the state of leaving the button of the stop switch 10 to the state of pressing the button of the stop switch 10, that is, the stop switch 10 is changed from the state of Figure 8 The status shown changes back to Fig. 9 In the state shown, the circuit controlled by the stop switch 10 is changed from an open state to a closed state again, so that the oil pump can continue to work.

[0075] The rail-type lifting platform anti-falling device of this embodiment can not only allow the lifting platform 8 to be supported by the support rod 3 to prevent the lifting platform 8 from falling suddenly, but also shut down the oil pump when the support rod 3 is opened to prevent the lifting platform 8 from moving. The operation is simple and quick.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A guide rail lifting platform anti-falling device, characterized in that: It includes a fixed plate, a rotating connecting plate, and a support rod, wherein the fixed plate is connected to the guide rail of the guide rail lifting platform, one end of the rotating connecting plate is hinged to the fixed plate, and one end of the rotating connecting plate away from the fixed plate is hinged to the support rod; A guide rod is provided on one side of the fixed plate close to the rotating connecting plate, and the rotating connecting plate is provided with an arc-shaped guide sliding hole for cooperating with the guide rod; The fixed plate is provided with a first positioning hole, the rotating connecting plate is provided with a second positioning hole for communicating with the first positioning hole, and both the first positioning hole and the second positioning hole are matched with the positioning rod; It also includes a stop switch disposed below the fixed plate, the stop switch is connected to the guide rail, the stop switch cooperates with the rotating connecting plate, and the stop switch is electrically connected to the oil pump; When the rotating connecting plate is in a vertical state, the lower end of the rotating connecting plate presses the button of the stop switch, the support rod is in a retracted state, and the oil pump is in a normal working state; When the rotating connecting plate is in a horizontal state, the lower end of the rotating connecting plate does not contact the button of the stop switch, the support rod is in an open state, the lower end of the support rod abuts against the ground, and the oil pump is in a stopped working state.

2. The anti-falling device for a rail-type lifting platform according to claim 1 is characterized in that: The guide rail type lifting platform includes two rows of guide rails, a lifting platform arranged between the two rows of guide rails, and a cylinder installed on a cylinder bracket. The guide rails and the cylinder bracket are both arranged on a base. A lifting seat is provided at the upper end of the piston rod of the cylinder. First roller seats are provided at both ends of the lifting seat. The first roller seat is provided with rollers for rolling along the guide rails. The first lifting seat is connected to the lifting platform through a chain.

3. The anti-falling device for a guide rail lifting platform according to claim 2, characterized in that: The lifting platform is provided with a guardrail.

4. The anti-falling device for a guide rail lifting platform according to claim 2, characterized in that: A second roller seat is provided on one side of the lifting platform close to the guide rail, and the second roller seat is provided with a second roller for rolling along the guide rail.

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